US6881962B2 - Paper fluorescence detection sensor - Google Patents

Paper fluorescence detection sensor Download PDF

Info

Publication number
US6881962B2
US6881962B2 US10/176,628 US17662802A US6881962B2 US 6881962 B2 US6881962 B2 US 6881962B2 US 17662802 A US17662802 A US 17662802A US 6881962 B2 US6881962 B2 US 6881962B2
Authority
US
United States
Prior art keywords
light
illumination
monitor
region
window
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US10/176,628
Other languages
English (en)
Other versions
US20020195571A1 (en
Inventor
Hideaki Kamijo
Kouyou Usami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Precision Corp
Original Assignee
Nidec Copal Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nidec Copal Corp filed Critical Nidec Copal Corp
Assigned to NIDEC COPAL CORPORATION reassignment NIDEC COPAL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KAMIJO, HIDEAKI, USAMI, KOUYOU
Publication of US20020195571A1 publication Critical patent/US20020195571A1/en
Application granted granted Critical
Publication of US6881962B2 publication Critical patent/US6881962B2/en
Adjusted expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/121—Apparatus characterised by sensor details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/86—Investigating moving sheets
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/14—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being sensed by radiation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/12—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using a selected wavelength, e.g. to sense red marks and ignore blue marks

Definitions

  • the present invention relates to a paper fluorescence detection sensor used for judging the type or authenticity of paper such as banknotes and the like.
  • the present invention was developed to resolve the above-described problems, and it is an object of the present invention to provide a paper fluorescence detection sensor capable of appropriately monitoring the intensity of light emitted by a light-emitting element (light source), thereby keeping the light-emitting element radiating light stably.
  • the present invention provides a paper fluorescence detection sensor in which paper sheets are illuminated with light as the paper sheets are being transported, and fluorescent light generated on the surface of the paper sheets is detected, this sensor comprising: a light-emitting element which is housed in a case and which forms an illumination region on a transportation path of the paper sheets by emitting light toward the transportation path via an illumination window; a light-receiving element housed in the case, which receives fluorescent light generated from the surface of the paper sheets via a light-receiving window; and an illumination monitor disposed inside the case so as to face the illumination window, which receives the light of the light-emitting element reflected by the inner surface of the illumination window, and which has a monitor region positioned outside the illumination region on the transportation path.
  • FIG. 1 is a cross-sectional view illustrating an example of a paper inspection device employing the paper fluorescence detection sensor in accordance with the present invention
  • FIG. 2 is a cross-sectional view illustrating an embodiment of the paper fluorescence detection sensor in accordance with the present invention.
  • FIG. 3 is a cross-sectional view of the paper fluorescence detection sensor shown in FIG. 2 , showing an illumination region R, a monitor region S and a light reception region K.
  • FIG. 1 is a cross-sectional view illustrating a paper inspection device 1 .
  • the object of inspection by the paper inspection device 1 is to discriminate between forged banknotes obtained by color copying and genuine banknotes. Forged banknotes obtained by color copying contain a large amount of fluorescence components.
  • the paper inspection device 1 detects forged banknotes using such feature of forged banknotes.
  • the paper inspection device 1 comprises a linear transportation path 4 disposed between the upper and lower guide plates 2 , 3 .
  • Transportation rollers 5 , 6 move the transportation path 4 , and a banknote 7 placed on the transportation path 4 is reliably transported toward the exit side.
  • a banknote recognition device 8 for distinguishing the denomination is disposed at a downstream point of the transportation path 4 .
  • the banknote recognition device 8 has a structure, which is not shown in the figure, such that the surface of banknote 7 is illuminated by a light source such as an LED and the light reflected from the banknote 7 is collected by a CCD camera. An image captured by the CCD camera is compared with known image data and the denomination of the banknote is discerned.
  • a light source such as an LED
  • CCD camera An image captured by the CCD camera is compared with known image data and the denomination of the banknote is discerned.
  • recent improvements in the accuracy of color copying have made it difficult to authenticate the banknote 7 by image recognition alone.
  • a paper fluorescence detection sensor 10 is disposed upstream of the banknote recognition device 8 .
  • the paper fluorescence detection sensor 10 comprises a partition 20 , which divides the inner space of a case 11 in substantially rectangular parallelepiped shape along the longitudinal direction into the space where a light-emitting element (UV LED) 12 is accommodated and the space where a light-receiving element 16 is accommodated.
  • the partition 20 divides a window 13 of the case 11 into a first window 23 (composed of the below-described illumination window 15 ) and a second window 24 (composed of the below-described light-receiving window 17 ).
  • the UV LED 12 which emits light toward the transportation path 4 of banknote 7 is housed in one of the spaces formed by the partition 20 in the case 11 .
  • This UV LED 12 is fixed to a drive circuit substrate 25 of the case 11 via a lead 12 a.
  • the light-emitting element 12 used herein is a UV LED with a visible light component included in the radiation. LED is used as a light source because it occupies small space, thereby contributing to downsizing the case 11 . Therefore, LED is most appropriate for this paper fluorescence detection sensor 10 , which has been designed with consideration for size reduction. Further, LED has an advantage in that the brightness spread is limited, and fluctuation in brightness intensity over time is small.
  • a dustproof glass plate 14 is fixed with an adhesive or the like to-the lower part of the case 11 so as to close the opening of the case 11 .
  • a quartz glass with very high UV transmittance is used for the dustproof glass plate 14 .
  • the illumination window 15 composed of a UV-transmitting filter is fixed slanted with an adhesive or the like to the case 11 and the partition 20 inside of the dustproof glass plate 14 . Therefore, because light emitted from the UV LED 12 passes through the UV-transmitting filter 15 , the UV component (for example, with a wavelength of around 300-400 nm) is released onto the transportation path 4 via the illumination window 15 and the dust proof glass plate 14 . The banknote 7 passing directly beneath the dust proof glass plate 14 on the transportation pass 4 is illuminated with UV light.
  • a light-receiving element (photosensor) 16 for detecting the fluorescence emitted from the surface of banknote 7 is housed in the other space formed by the partition 20 inside the case 11 .
  • This light-receiving element 16 is fixed to the drive circuit substrate 25 of case 11 via a lead 16 a . Therefore, when the banknote 7 illuminated with UV light contains a fluorescent component, the excited fluorescence is emitted from the banknote 7 and detected by the light-receiving element 16 .
  • the intensity of fluorescence detected by the light-receiving element 16 is high.
  • a genuine banknote contains practically no fluorescent components and the intensity of fluorescence detected by the light-receiving element 16 is very small.
  • the light-receiving window 17 composed of a UV-cut filter is fixed with an adhesive to the case 11 and the partition 20 inside of the dust proof glass plate 14 so as to cover the opening of the space where the light-receiving element 16 is accommodated.
  • a UV-cut filter is used for the following reason: the light reflected by the surface of banknote 7 contains a UV component and this UV component has a high energy characteristic. Therefore, the UV component must be removed to avoid erroneous detection.
  • the intensity of light emitted by the UV LED 12 has to be adjusted with an illumination monitor 18 measuring the intensity of light emitted by the UV LED 12 .
  • the intensity of light detected by the illumination monitor 18 is affected by the following external factors (factors other than changes in the intensity of light emitted by the UV LED 12 ) such that accurate measurement of the intensity of light emitted by the UV LED 12 with the illumination monitor 18 maybe impeded.
  • Banknotes 7 are successively transported at a high speed and at a constant spacing on the transportation pass 4 , and the UV LED 12 constantly illuminates either the banknotes 7 or the portion where no banknote 7 is present (between the banknote 7 and the next banknote 7 ). Namely, in one occasion the light reflected by the banknote 7 is incident from the illumination window 15 , and in the other occasion no reflected light from the banknote 7 is generated. As a result, the intensity of light incident on the illumination window 15 changes intermittently. Furthermore, the intensity of reflected light differs depending on the type of banknote 7 (for example, a 1000-yen banknote or a 10,000-yen banknote). That is, the intensity of light incident on the illumination window 15 changes each time the banknote denomination is changed. Such changes in the intensity of light incident on the illumination window 15 from outside case 11 may fluctuate the intensity of light detected by the illumination monitor 18 .
  • the illumination monitor 18 composed of a photosensor is disposed in the space of the UV LED 12 side.
  • the illumination monitor 18 is disposed inside the case 11 so as to face the inner surface 15 a of the illumination window 15 and is fixed to the drive circuit substrate 25 via the lead 18 a .
  • the illumination monitor 18 forms a monitor region S on the transportation path 4 , outside the illumination region R created by the UV LED 12 , so as to eliminate as thoroughly as possible the effect of light reflected from the transportation pass 4 .
  • the illumination region R and monitor region S of the, present embodiment will be described hereinbelow.
  • the illumination region R is a portion from which the UV light emitted by the UV LED 12 via the illumination window 15 is reflected, that is, the region on the transportation path 4 which is illuminated with the UV light from the UV LED 12 .
  • the monitor region S is the region on the transportation path 4 from which the scattered light or reflected light can enter the illumination monitor 18 .
  • a conventional light-receiving element with a comparatively wide light reception region is used as the illumination monitor 18 with the aim of reducing the production cost.
  • An aluminum light-shielding sheet 30 as an example of light-shielding means, is fixed with an adhesive to the inner surface 15 a of illumination window 15 composed of a UV-transmitting filter. This light-shielding sheet 30 restricts the inner side of the monitor region S so that the illumination region R does not enter the monitor region S on the transportation path 4 . Further, the outer side of the monitor region S is restricted by the lower end of partition 20 .
  • the illumination monitor 18 is prevented from picking up the light reflected from the illumination region R (reflected light on the transportation path 4 ), whereby the effect of external factors (factors other than changes in the intensity of light emitted by the UV LED 12 ) on the intensity of light detected by the illumination monitor 11 is eliminated as thoroughly as possible.
  • the monitor region S is positioned outside the illumination region R, enabling the illumination monitor 18 appropriately monitor the intensity of light emitted from the UV LED 12 by detecting the light reflected from the inner surface 15 a of the illumination window 15 .
  • the illumination window 15 is provided with light-shielding means while restricting the light-receiving region of the illumination monitor 18 , the use of conventional inexpensive light-receiving elements with wide light-receiving region becomes possible.
  • the monitor region S can be limited to an arbitrary size by a simple operation of attaching (for example, with an adhesive) a light shielding sheet molded as a separate component, that is, with out producing the light-shielding means integrally with the illumination window, to the inner surface 15 a of illumination window 15 .
  • attaching for example, with an adhesive
  • a light shielding sheet molded as a separate component that is, with out producing the light-shielding means integrally with the illumination window
  • a structure in which the light-shielding sheet 30 is formed from a reflective material such as aluminum increases the intensity of light reflected from the inner surface 15 a of illumination window 15 , because the illumination monitor 18 receives not only the light reflected by the inner surface 15 a of the illumination window 15 , but also the intensive light reflected by the light-shielding sheet 30 .
  • the intensity of light received by the illumination monitor is increased and fluctuations in the intensity of light emitted by the light-emitting element can be accurately detected, thereby keeping the UV LED 12 emitting light stably.
  • the reference symbol K denotes the light-receiving region of light-receiving element 16 on the transportation pass 4 , and this light-receiving region K is slightly larger than the illumination region R.
  • light-shielding means may be embedded in the illumination window 15 , or light-shielding means maybe formed from a light-absorbing material, rather than reflective material.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Toxicology (AREA)
  • Pathology (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Theoretical Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Electromagnetism (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Image Input (AREA)
US10/176,628 2001-06-25 2002-06-24 Paper fluorescence detection sensor Expired - Fee Related US6881962B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2001191708A JP4596690B2 (ja) 2001-06-25 2001-06-25 紙葉類蛍光検出センサ
JPP2001-191708 2001-06-25

Publications (2)

Publication Number Publication Date
US20020195571A1 US20020195571A1 (en) 2002-12-26
US6881962B2 true US6881962B2 (en) 2005-04-19

Family

ID=19030291

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/176,628 Expired - Fee Related US6881962B2 (en) 2001-06-25 2002-06-24 Paper fluorescence detection sensor

Country Status (2)

Country Link
US (1) US6881962B2 (ja)
JP (1) JP4596690B2 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060152727A1 (en) * 2005-01-07 2006-07-13 Bickmore William D Jr Fluorescence detection system
US20100271619A1 (en) * 2007-12-21 2010-10-28 Giesecke & Devrient Gmbh Sensor for checking valuable documents
US9816131B2 (en) 2010-08-02 2017-11-14 Dxna Llc Pressurizable cartridge for polymerase chain reactions
DE102020000968A1 (de) 2020-02-14 2021-08-19 Giesecke+Devrient Currency Technology Gmbh Optischer Sensor zur Prüfung von Wertdokumenten

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7110093B2 (en) 2003-02-28 2006-09-19 Nidec Copal Corporation Inspection apparatus and inspection method
CA2453229A1 (en) * 2003-12-12 2005-06-12 Cashcode Company Inc. Reflective optical sensor for bill validator
JP4603271B2 (ja) * 2004-01-28 2010-12-22 日本電気株式会社 画像入力装置
JP4901228B2 (ja) * 2006-02-07 2012-03-21 株式会社東芝 分光検出装置
JP4906415B2 (ja) * 2006-07-11 2012-03-28 株式会社リコー 電子写真感光体の検査方法及び検査装置
WO2008075069A1 (en) * 2006-12-21 2008-06-26 Talaris Holdings Limited Counterfeit document detector
EP2131183A1 (de) * 2008-06-05 2009-12-09 Bohle AG Vorrichtung zur Bestimmung der Elementbelegung auf einer Oberfläche mittels Fluoreszenz
EP2288902B1 (de) * 2008-06-05 2013-05-22 Bohle AG Vorrichtung zur bestimmung der elementbelegung auf einer glasoberfläche mittels fluoreszenz
JP2010272009A (ja) * 2009-05-22 2010-12-02 Hitachi Omron Terminal Solutions Corp 紙葉類光学特性識別装置、紙葉類光学特性識別装置の設計方法、紙葉類光学特性検出方法
DE102013207479B3 (de) * 2013-04-24 2014-10-02 Bundesdruckerei Gmbh Verfahren zur schnellen Bestimmung der absoluten Lumineszenzintensität
EP3006910A4 (en) * 2013-05-29 2017-02-08 Konica Minolta, Inc. Illumination device and reflection-characteristics measurement device
JP6533417B2 (ja) 2015-06-03 2019-06-19 日立オムロンターミナルソリューションズ株式会社 紙葉類取扱装置
DE102016000012A1 (de) * 2016-01-05 2017-07-06 Giesecke & Devrient Gmbh Echtheitsprüfung von Wertdokumenten
AU2018242894B2 (en) * 2017-03-27 2020-11-05 Glory Ltd. Optical sensor, light detection apparatus, sheet processing apparatus, light detection method, and phosphorescence detection apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995019019A2 (en) 1994-01-04 1995-07-13 Mars, Incorporated Detection of counterfeits objects, for instance counterfeits banknotes
US5640463A (en) 1994-10-04 1997-06-17 Cummins-Allison Corp. Method and apparatus for authenticating documents including currency
US5918960A (en) 1994-01-04 1999-07-06 Mars Incorporated Detection of counterfeit objects, for instance counterfeit banknotes
DE19958048A1 (de) * 1999-12-03 2001-06-07 Giesecke & Devrient Gmbh Vorrichtung und Verfahren zur Echtheitsprüfung von Banknoten

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001052232A (ja) * 1999-08-10 2001-02-23 Fuji Electric Co Ltd 紙葉類真偽識別装置
JP4163822B2 (ja) * 1999-09-08 2008-10-08 日本電産コパル株式会社 紙葉類用の蛍光検出装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995019019A2 (en) 1994-01-04 1995-07-13 Mars, Incorporated Detection of counterfeits objects, for instance counterfeits banknotes
US5918960A (en) 1994-01-04 1999-07-06 Mars Incorporated Detection of counterfeit objects, for instance counterfeit banknotes
US5640463A (en) 1994-10-04 1997-06-17 Cummins-Allison Corp. Method and apparatus for authenticating documents including currency
DE19958048A1 (de) * 1999-12-03 2001-06-07 Giesecke & Devrient Gmbh Vorrichtung und Verfahren zur Echtheitsprüfung von Banknoten
US20030039359A1 (en) * 1999-12-03 2003-02-27 Klaus Thierauf Device and method for verifying the authenticity of banknotes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060152727A1 (en) * 2005-01-07 2006-07-13 Bickmore William D Jr Fluorescence detection system
US7315376B2 (en) 2005-01-07 2008-01-01 Advanced Molecular Systems, Llc Fluorescence detection system
US20100271619A1 (en) * 2007-12-21 2010-10-28 Giesecke & Devrient Gmbh Sensor for checking valuable documents
US8605267B2 (en) 2007-12-21 2013-12-10 Giesecke & Devrient Gmbh Sensor for checking valuable documents
US9816131B2 (en) 2010-08-02 2017-11-14 Dxna Llc Pressurizable cartridge for polymerase chain reactions
DE102020000968A1 (de) 2020-02-14 2021-08-19 Giesecke+Devrient Currency Technology Gmbh Optischer Sensor zur Prüfung von Wertdokumenten

Also Published As

Publication number Publication date
US20020195571A1 (en) 2002-12-26
JP4596690B2 (ja) 2010-12-08
JP2003006625A (ja) 2003-01-10

Similar Documents

Publication Publication Date Title
US6881962B2 (en) Paper fluorescence detection sensor
JP5367509B2 (ja) 光検出装置、及びこの光検出装置を備える紙葉類処理装置
US6603126B2 (en) UV/fluorescence detecting apparatus and sensing method thereof
JP4609531B2 (ja) 画像読取装置
US8199379B2 (en) Optical detection apparatus, and sheet processing apparatus having the optical detection apparatus
JP4320656B2 (ja) 画像読取装置
EP1962490B1 (en) Image sensor
EP1254435B1 (en) Document authenticating apparatus and method
US6998623B2 (en) Sheets fluorescence detecting sensor
WO2005078670A1 (ja) 検査装置
EP1439500B1 (en) A banknote detecting unit for a banknote distinguishing device
JP6579863B2 (ja) 読取装置および透過光源ユニット
WO2019194152A1 (ja) 光検出センサ、光検出装置、シート類処理装置および光検出方法
JP4163822B2 (ja) 紙葉類用の蛍光検出装置
JP2003162748A (ja) 紙葉類蛍光検出センサ
WO2019082251A1 (ja) 光センサ、光センサモジュール及び紙葉類処理装置
JP4721509B2 (ja) 紙葉類検出センサ
JPH11250308A (ja) 紙葉類反射センサ
JP2001056877A (ja) 紙葉類のスレッド検出方法及びその装置
JP4127797B2 (ja) 紙葉類蛍光検出センサ
JP2002183795A (ja) 紙葉類検出センサ
JP2001307170A (ja) 紙葉類の蛍光スレッド検出装置
JP2003296792A (ja) 紙葉類蛍光検出センサ
JP2001283281A (ja) 紙葉類の蛍光スレッド検出装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: NIDEC COPAL CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KAMIJO, HIDEAKI;USAMI, KOUYOU;REEL/FRAME:013028/0083

Effective date: 20020613

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20170419